<template>
    <div class='login_container'>
      <div class=login_box>
        <!-- 头像区域 -->
        <div class=avater_box>
          <img src="@/assets/logo.png" alt="">
        </div>
        <!-- 登录表单区域 -->
        <el-form ref="loginFormRef" :model='loginForm' :rules="loginFormRules" label-width="0px" class="login_form">
          <el-form-item prop='username'>
            <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
          </el-form-item>
          <!-- 密码区域 -->
          <el-form-item prop='password'>
            <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class='btns'>
              <el-button type="primary" @click='login'>登录</el-button>
              <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
</template>

<script>
export default {
  name: 'Login',
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败，请重新输入')
        this.$message.success('登录成功')
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped>
  .login_container{
    background-color: #2b4b6b;
    height:100%
  }
  .login_box{
    width:450px;
    height:300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left:50%;
    top: 50%;
    transform:translate(-50%,-50%);
  }
  .avater_box{
    height:130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius:50%;
    padding: 10px;
    box-shadow:0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform:translate(-50%,-50%);
    background-color: #fff;
  }
  .avater_box img{
    width:100%;
    height:100%;
    border-radius:50%;
    background-color: #eee;
  }

  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing:border-box;
  }
  /* 按钮 */
  .btns{
    display: flex;
    justify-content:flex-end;
  }
</style>
